John G. Pratt, a Baptist missionary to the Delaware Indians, wrote to Charles Robinson from Delaware, Kansas Territory, describing the politics of the negotiations taking place with the Delaware Indian land purchase. "Old Sar-koxy," a Delaware leader, had indicated that Robinson was attending to his business, which angered younger Delaware delegates Isaac and Charles Johnnycake. Pratt indicated his confidence that the sale would take place regardless of who led the negotiations for the Delaware.

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